Template-free synthesis of monodispersed Y3Al5O12:Ce3+ nanosphere phosphor

Hee-Suk Roh; Dong Hoe Kim; Ik-Jae Park; Hee Jo Song; Seyoon Hur; Dong-Wan Kim; Kug Sun Hong

doi:10.1039/C2JM30598D

Template-free synthesis of monodispersed Y₃Al₅O₁₂:Ce³⁺ nanosphere phosphor†

Hee-Suk Roh,^a Dong Hoe Kim,^a Ik-Jae Park,^a Hee Jo Song,^a Seyoon Hur,^a Dong-Wan Kim*^b and Kug Sun Hong*^a

* Corresponding authors

^a Department of Materials Science and Engineering, Seoul National University, Shillim-dong, San 56-1, Gwanak-gu, Seoul, Korea
E-mail: kshongss@plaza.snu.ac.kr
Fax: +82-2-886-4156
Tel: +82-2-880-8024

^b Department of Materials Science and Engineering, Ajou University, Woncheon-dong, San 5, Yeongtong-gu, Suwon 443-749, Korea
E-mail: dwkim@ajou.ac.kr
Fax: +82-31-219-1612
Tel: +82-31-219-2468

Abstract

Monodispersed Ce³⁺-doped Y₃Al₅O₁₂ (YAG:Ce³⁺) nanospheres were synthesized through forced hydrolysis using a urea method, followed by thermal calcination processes, and their luminescence properties were examined. The crystallization of the YAG:Ce³⁺ phase and morphological evolutions after subsequent heat treatment were characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Energy dispersive spectroscopy (EDS) analysis revealed that the amorphous aluminum oxide layer played an important role in preventing necking between the particles during heat treatment. As a result, stand-alone YAG:Ce³⁺ nanospheres with an amorphous aluminum oxide layer shell were synthesized while maintaining monodispersity with an average particle diameter of about 33 nm. These nanospheres had a dense structure and smooth surface with relatively good crystallinity after annealing at 1075 °C. They absorbed light efficiently in the visible region of 400–500 nm, and showed a single broadband emission peak at 536 nm with a luminescence quantum efficiency (QE) of 33% and relatively good photostability.

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Article information

DOI: https://doi.org/10.1039/C2JM30598D
Article type: Paper
Submitted: 31 Jan 2012
Accepted: 14 Apr 2012
First published: 17 May 2012

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J. Mater. Chem., 2012,22, 12275-12280

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Template-free synthesis of monodispersed Y₃Al₅O₁₂:Ce³⁺ nanosphere phosphor

H. Roh, D. H. Kim, I. Park, H. J. Song, S. Hur, D. Kim and K. S. Hong, J. Mater. Chem., 2012, 22, 12275 DOI: 10.1039/C2JM30598D

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